Timer with uncapped frame rate
Turns out I've answered my own question. Here's a quick script for anyone who finds this later down the road. Just attach this to a text property and you should be good.

import bge 
from datetime import datetime

textObject = bge.logic.getCurrentController().owner 
timePassed = bge.logic.getRealTime()
timePassed = str(round(timePassed,2))
textObject.text = timePassed